Re: Sample formats: fltp (lossy) to s16p or s32p (ALAC)

The "pro studio standard" seems to be 24/96 (with the software using floating-point "internally"... There a couple of good reasons for using floating-point for audio editing/processing/DSP).

I think one company makes a 32-bit DAC chip. I'm not aware of any floating-point audio DACs. And, from what I've read most 24-bit DACs (and ADCs) are only accurate to around 20-bits. So, you can't directly-play a 32-bit or floating-point file.

Re: Sample formats: fltp (lossy) to s16p or s32p (ALAC)

I only want to preserve the possibility to get back to the beginnig condition.And I‘m not sure about the in-depth technics and algorithm the encoders use.

But when ffmpeg shows me a depth of 32 bit for the floating point algorithm and for the s32p algorithm also 32 bit. I see with my limited knowledge to stick with the s32p algorithm should be the best.Am I right?

Re: Sample formats: fltp (lossy) to s16p or s32p (ALAC)

because of compatibility problems I need to convert some DTS, DTS-HD HR, AC-3 and E-AC-3 audio streams to ALAC.The lossy formats are stored as fltp (depth: 32 bit).

I'm a bit confused, a device or software which can play ALAC but not AC-3?

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To preserve all information, should I convert them to s16p-ALAC or better s32p-ALAC (although mediainfo sometimes tells me bit depth of lossy stream is 16 bit).

If you don't want to lose anything the new format should be as close to the old ones as possible. For example in XLD when I chose ALAC, the default setting is to use bit depth and frequency from the source file.

To preserve all information, should I convert them to s16p-ALAC or better s32p-ALAC (although mediainfo sometimes tells me bit depth of lossy stream is 16 bit).

If you don't want to lose anything the new format should be as close to the old ones as possible. For example in XLD when I chose ALAC, the default setting is to use bit depth and frequency from the source file.

Lossy audios don't have a bit depth, it is embedded in the meta information. But sometime this information is missing.

Re: Sample formats: fltp (lossy) to s16p or s32p (ALAC)

Though you won't get the "original" bits back, AC-3 can store a far greater dynamic range than can be represented in 16-bits.

It can happily store a sound peaking at 0dB FS one moment, and then one of -120dB FS the next. The latter sound would be lost in the dither noise (or rounded / truncated out of existence without dither) with 16-bits.

Just because you don't get the original 24-bits back doesn't mean it can't make some use of 24-bits.

From context I'm assuming you really mean loudness, and that "112 dB" is probably 112dBSPL. Loudness and dynamic range are different things. If yours speakers go up to 112 dbspl, you probably have something like 80-85dB dynamic range, and can produce something like 14 bits.